Services
Two ways to work with me, same standards on both. I build custom apps, and I build AI agents that take repetitive admin off your plate. 240+ apps shipped since 2012, over 2.2 million App Store downloads, and 25+ years of knowing what works and what doesn't.
App development
I build apps for iOS, Android, macOS, Windows, and the web. The difference between Overpass and a traditional agency is simple: you talk directly to the person who writes the code. No account managers, no project managers, nothing gets lost in translation.
AI agents handle the repetitive parts of development: scaffolding, boilerplate, testing, documentation. That leaves me the parts that matter: architecture, user experience, and making sure the product solves a real problem.
The process
- Discovery call (free, 30 minutes). We talk about what you want to build. I'll tell you honestly if it's a good idea, a bad idea, or something in between.
- Proposal (24-48 hours). A detailed proposal with mockups, technical spec, timeline and pricing. Not a vague estimate; a plan you can act on.
- Build. I build the thing. Weekly progress updates, a staging build you can test, and direct access to me throughout.
- Ship. We get it into the app stores, deployed to the web, or wherever it needs to go. I handle all the signing, provisioning, and submission headaches.
I once delivered a full client proposal (mockups, technical spec, pricing and documentation) in under 24 hours. That's not a one-off. It's how I work when the tools are right and the focus is there.
Tech stack
- Mobile and desktop
- Flutter
- Web
- React, Astro, Next.js
- Backend
- Firebase, Supabase, Node.js
- AI
- Claude, GPT, custom agents
- CI/CD
- Fastlane, GitHub Actions
AI agents
Most businesses lose hours every week to the same repetitive admin: quoting, follow-ups, scheduling, reporting. If a person does it the same way every time, an AI agent can probably do it. I put custom agents on that work so it runs on its own, not with duct tape and Zapier but with tooling that holds up.
What an agent can take off your plate
- Quoting and proposal drafting
- Follow-ups and outreach pipelines
- Scheduling and calendar coordination
- Reporting and data collection
- Customer support triage
- Internal operations and monitoring
Overpass itself runs on AI agents. Support, reporting and follow-ups run without me touching them. I build the same systems for clients.
How it works
- Free 30-minute call to see if there's a fit
- £500 discovery session to map your workflows in detail
- You get a written report with recommendations, yours to keep regardless
- If you proceed, the £500 is credited toward the build
Transparent pricing
No hidden costs, no "contact us for pricing" games. Here's what to expect.
Simple app
A focused app with a single core feature. Great for MVPs, internal tools, or niche utilities.
- Single platform (iOS or Android)
- Core feature set
- App Store / Play Store submission
- 2-4 weeks delivery
Most popular
Full app
A complete app with multiple features, cross-platform support, and a backend service.
- iOS + Android (Flutter)
- Backend (Firebase/Supabase)
- User authentication
- Push notifications
- Both store submissions
- 4-8 weeks delivery
Complex app
A multi-platform application with advanced features, integrations, and custom infrastructure.
- Multiple platforms
- Advanced backend logic
- Third-party integrations
- Custom API development
- Admin dashboard
- 8-12 weeks delivery
Automation discovery session
Every automation project starts with a £500 discovery session. You get a written report with workflow analysis and recommendations, yours to keep regardless. If you decide to proceed, the fee is credited toward the build.
These are starting points, not fixed prices. Every project is different. I'll always tell you upfront if something isn't worth building.
Your project, your code
Working with a solo developer is a fair question to think about, so here's how I handle it. All code lives in version control with full documentation from day one. The source code and every asset belong to you, not me, not Overpass. Projects are structured so that any competent developer could pick them up and keep going without needing to reverse-engineer anything. And every project includes 30 days of bug-fixing after launch, at no extra cost.
Ready to talk?
Book a free 30-minute call. No sales pitch, no pressure. An honest conversation about what you're trying to build and whether I can help.
Book a free call (opens in a new tab)Frequently asked questions
How much does it cost to build an app?
App development starts from £5,000 for a simple single-platform app and goes up to around £20,000 for complex multi-platform applications. These are starting points; every project is different. The best way to get an accurate quote is to book a free 30-minute discovery call.
How long does it take to build an app?
A simple app can be built and submitted to app stores in 2-4 weeks. More complex applications typically take 6-12 weeks. AI-powered development tools mean I deliver significantly faster than traditional agencies with similar quality.
What technology stack do you use?
Flutter for mobile and desktop apps (iOS, Android, macOS, Windows), React or Astro for web applications, Firebase or Supabase for backend services, and Node.js for server-side logic. The stack is chosen based on what fits the project best, not what's trendy.
Do you work with clients outside the UK?
Yes. All communication and project management is done remotely. Discovery calls, progress updates, and deliveries all happen online. Time zone differences haven't been a problem.